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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 418 · 40 questions
TalentJR

Remember (ON + OFF = one blink): 1 second = 1000 ms. One blink = ON wait + OFF wait. Blinks = total time in ms ÷ one blink; repeat n times takes n × one round.

NameDateTime takenScore ___ / 40
  1. 1.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  3. 3.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 8 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 4 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 0.7 seconds?
  8. 8.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) waits 500 seconds (d) pauses for half a second
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  11. 11.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 18 seconds?
  14. 14.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  30. 30.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 3 seconds?
  32. 32.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ How many milliseconds is a wait of 2.8 seconds?
  35. 35.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 6 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 3 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ A program says “wait 9000 ms”. How many seconds is that? =

Answer key

  1. 4800
  2. 1000
  3. 6.25
  4. 10
  5. 4
  6. 4000
  7. 700
  8. pauses for half a second
  9. 750
  10. 25
  11. 7000
  12. 14
  13. 9
  14. 2.75
  15. 11400
  16. 1600
  17. 16
  18. 10
  19. 700
  20. 7200
  21. 5400
  22. 2.25
  23. 7
  24. 4.75
  25. 500
  26. 1150
  27. 7.75
  28. 1050
  29. 2
  30. 9.75
  31. 3
  32. 1.25
  33. 1450
  34. 2800
  35. 4
  36. 19000
  37. 3
  38. 3000
  39. 1
  40. 9

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